Mechanisms of Freezing -Thawing Induced Wind Erosion in Qinghai -Tibet Plateau
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Mechanisms of Freezing -Thawing Induced Wind Erosion in Qinghai -Tibet Plateau
Bulletin of Soiland Water ConservationVol. 31, Issue 2, Pages: 64-68(2012)
作者机构:
1. 中国科学院寒区旱区环境与工程研究所沙漠与沙漠化重点实验室,甘肃,兰州,730000
2. 中国科学院 寒区旱区环境与工程研究所 敦煌戈壁荒漠研究站,甘肃 敦煌,736200
3. 甘肃省风沙灾害防治工程技术研究中心,甘肃,兰州,730000
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Published:2012
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XIE Sheng-bo, QU Jian-jun, HAN Qing-jie. Mechanisms of Freezing -Thawing Induced Wind Erosion in Qinghai -Tibet Plateau[J]. Bulletin of Soiland Water Conservation, 2012, 31(2): 64-68.
DOI:
XIE Sheng-bo, QU Jian-jun, HAN Qing-jie. Mechanisms of Freezing -Thawing Induced Wind Erosion in Qinghai -Tibet Plateau[J]. Bulletin of Soiland Water Conservation, 2012, 31(2): 64-68.DOI:
Mechanisms of Freezing -Thawing Induced Wind Erosion in Qinghai -Tibet Plateau
Freezing and thawing cycles occur very often in the Qinghai-Tibet Plateau due to its unique environment with high elevation and cold temperature. The frequent freezing and thawing cycles lead readily to wind erosion during the dry windy conditions,resulting in the emergence of desertification. Freezing-thawing induced wind erosion prevails as a major form of erosion on the Qinghai-Tibet Plateau. Based on simulated experiments using soil samples on the surface of the Plateau,we found that the wind erosion intensity increased with the frequency of the freezing-thawing cycles,the water content of the soil,and the temperature difference in the freezing-thawing process. It is concluded that,the damage of soil structure caused by the repeated,fierce freezing-thawing behaviors was the main reason for wind erosion in the plateau,and the sand-suspended wind was the main driving force.